21553140

Names of 21553140

• Cardinal: 21553140 can be written as Twenty-one million, five hundred fifty-three thousand, one hundred forty.

Scientific notation

• Scientific notation: 2.155314 × 10⁷

Factors of 21553140

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 7348

Divisors of 21553140

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 49 60 70 84 98 105 140 147 196 210 245 294 420 490 588 735 980 1470 2940 7331 14662 21993 29324 36655 43986 51317 73310 87972 102634 109965 146620 153951 205268 219930 256585 307902 359219 439860 513170 615804 718438 769755 1026340 1077657 1436876 1539510 1796095 2155314 3079020 3592190 4310628 5388285 7184380 10776570 21553140
• Sum of all divisors σ(n): 70211232
• Sum of proper divisors (its aliquot sum) s(n): 48658092
• 21553140 is an abundant number, because the sum of its proper divisors (48658092) is greater than itself. Its abundance is 27104952

Bases of 21553140

• Binary: 1010010001101111111110100₂
• Hexadecimal: 0x148DFF4
• Base-36: CTYIC

Squares and roots of 21553140

• 21553140 squared (21553140²) is 464537843859600
• 21553140 cubed (21553140³) is 10012249184004099144000
• The square root of 21553140 is 4642.5359449335
• The cube root of 21553140 is 278.2937908215

Scales and comparisons

• 21,553,140 seconds is equal to 35 weeks, 4 days, 10 hours, 59 minutes.
• To count from 1 to 21,553,140 would take you about three days!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 21553140 cubic inches would be around 23.2 feet tall.

Recreational maths with 21553140

• 21553140 backwards is 04135512
• 21553140 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21553140's digits is 21
• More coming soon!